Title of Invention

"A FORMULATION FOR THE PREPARATION OF MATERIAL FOR MAKING IMPRESSION OF AN OBJECT"

Abstract The present invention provides a formulation for preparation of material to capture the three dimensional shape and size of an object for industrial applications. The material finds potential use for manufacture of custom made footwear and orthoses. The formulation comprising of a base material selected from starch or powdered oil cake , a binder selected from water or vegetable oil 66-86% v/w on the basis of base material, 1.5 -3.0% w/w of a preservative on the basis of base material, 1 - 3% v/w of plasticizer on the basis of base material, and optionally 1 - 4% v/v of a coloring agent.
Full Text The present invention relates to a formulation for the preparation of a material for taking impression of an object More particularly, the present invention provides a material to capture the three dimensional shape and size of an object for industrial applications The material finds potential use for manufacture of custom made footwear and orthoses Orthopedic custom made footwear is prescribed for those who have abnormal foot because of Diabetes, Arthritis or any other degenerative changes of bone The material finds use in manufacture of customized athletic shoes also
Most of the methods of mold making have involved the use of plaster of Pans which is still in use Some have involved the use of a combination of a flexible material filled with a mixture of sand and a fluid Once formed around an object, the fluid is removed through a drain equipped with a filter and the remaining sand solidifies to a sufficient extent permitting the mold to retain its impression of the object For the most part, the field of mold making, and particularly the field of foot impressions, has employed the use of plaster of Paris More recently, however, there have become available foam-box kits for making impression of the sole of a foot The specific problems associated with the current methods of taking foot impressions have lead to the development of the present invention
The drawback of using plaster of Pans is that it is very messy, that it requires the use of a release agent, and that the patient's foot must remain in a fixed position within the plaster of Pans for approximately thirty minutes to allow the plaster of Pans to set The compressible foam impression systems reduce the time required to complete a foot impression, however, these systems are generally applied when a person is sitting and the foot is suspended In all of these methods, the resulting insoles tend to support the foot in a non-natural position which is different from the foot position which results when weight is placed on the foot They either do not produce a natural foot position or produce insufficient detail of the bottom of the foot Accordingly, it is believed that such systems do not provide all the advantages or correction for which they have been promoted In addition, numerous of such prior methods require the
artificial build of vanous areas of the molded insole with extra material to accommodate for pressure points on the foot
Daley, (U S Pat No 4,979,252) provides for an apparatus and a method for making custom insoles The custom insole is made up of a plurality of layers of a thermoformable material that conform in size and contour to the bottom surface of a foot The method of making the insole involves placing an unformed blank of the thermoformable material on a casting platform which in turn is on a horizontal surface A foot is placed on top of the unformed blank and pressure is applied downwardly The foot and then the blank are removed from the casting platform Although this system is an attractive method of creating custom insoles, it is incapable of producing a mold of the lower side region of foot
Mead, (U S Pat No 2,472,754) provides for a method of making and maintaining an impression of the shape of a human foot The method involves the use of a flexible material, forming an enclosing "bladder" which is filled with a sand/fluid mixture, as the substrate for mold formation At least three separate bladders are used for creating the impression of the human foot Reduction of the fluid pressure within each bladder through an attached hand valve creates a "solidified" mold with the remaining sand Even though this method is capable of producing a mold of the foot, it is cumbersome, time-consuming, may not be completely accurate, and requires vanous pieces of relatively expensive equipment
Pierce, (U S Pat No 1,824,835) provides for a device for taking foot impressions in a plaster of Pans cast to aid in the construction of footwear The device is a mold of foot-shaped design embodying a base and a sectional foot-shaped shell for confining the plaster of Pans about the foot to produce an accurate impression This system represents the traditional method used After application of a seam-release agent, the bottom half of the foot and the postenor ankle region are molded first, then the top half of the foot and the antenor ankle are molded to complete the cast After hardening, the
cast is opened along a seam by pulling a pair of wires, which were placed within the mold during the initial setup, thereby cutting the seam to allow release of the foot As mentioned above, the major drawbacks of this system are the mess involved in making the plaster of Paris, the need for applying a release agent to the appendage, and the lengthy set time required for the plaster of Paris
Smithers Bio-Medical Systems, Kent, Ohio, provides a system called Bio-Foam Impression Foam System, for capturing the impression of the plantar foot surface The foam is compressible foam formulated to capture fine details of the sole of the foot It is available in bulk, double-slab, and single-tray compression kits A key problem with this system is that it fails to provide the means to take an impression of the foot in weight bearing position
The main limitation of these impression matenals is their high cost For example,
Biofoam® one pair is $ 8 6
Another drawback of these matenals is that they will give mold of the foot in sitting
position rather than in weight beanng position
Yet another drawback of these materials is that the impression once made is
irreversible and the matenal can not be reused
Yet another drawback of these matenals is need of skilled person to use it
Yet another limitation of these materials is that elevated detail reproduction of the
object can not be expected from the impression made
Yet another drawback of these matenals is that they are synthetic, so have disposing
problem
The main objective of the present invention is to provide a formulation for the preparation of a material for taking impression of an object, which obviates the drawbacks stated above
Another object of the present invention is to provide an impression material that does not involve the use of plaster of Paris or involve the use of seam release agent
Yet another object of present invention is to provide a convenient, easy-to-use, and economical system for making impression of foot
Still another object of the present invention is to use natural material for preparing the impression material, so that it will be biodegradable and environmental friendly
Still another object of the present invention is to prepare an impression material that will reduce user's error and can be reused for the same purpose after the mold had casted into "last"
Still another object of the present invention is to provide much cheaper process for preparation of foot impression material
Accordingly, the present invention provides a formulation for the preparation of a material for taking impression of an object characterized in that it comprises a base material selected from starch or powdered oil cake having particle size such as herein described , a binder selected from water or vegetable oil 66-86% v/w on the basis of base material, 15-3 0% w/w of a preservative on the basis of base material, 1 - 3% v/w of plasticizer on the basis of base material, and optionally 1 - 4% v/v of a coloring agent such as herein described
In an embodiment of present invention, the particle size of the powdered starch used may be in the range of 100 – 750µ
In another embodiment of present invention, the oil cake used may be selected from
coconut oil cake, ground nut oil cake, gingih oil cake
In yet another embodiment of the present invention, the vegetable oil used may be selected from coconut oil, ground nut oil, gingih oil, castor oil In still another embodiment of the present invention, the plasticizer used may be selected from dioctyl phthalate, dibutyl phthalate, dnsooctyl phathalate, glycerol In yet another embodiment of the present invention, the preservative used may be selected from sodium bisulphate, potassium bisulphate, sodium metabisulphate, potassium metabisulphate, sodium sulphate, sodium dioxide
The present invention provides a formulation for the preparation of a material for
taking impression of an object
The procedure of the present invention is described below in detail
Starch, particle size 100 - 750u, is treated with 66- 86 % v/w of water and made into
dough Oil cake, particle size 2000 - 2500 u, is treated with 66- 86 % v/w of water or
vegetable oil and made into dough The dough materials made are mixed-Separately
with 1 5 - 3 0 % w/w of preservative, 1 - 3 % v/w of plasticizer and optionally 1 -4 %
v/v of coloring agent Finally the materials are packed in containers separately for
taking impression of object and stored at 14 ° C
The formulation prepared is not mere admixture but has synergistic property of its
ingredients having different property from the individual ingredients
The novelty and non-obviousness of the present invention lies on the materials
selected for the preparation of impression material and on its reusability Further, the
materials used for the present invention are natural and are biodegradable
The following examples are given by way of illustration and therefore should not be construed to limit the scope of the present invention
Example 1
About 200 g of starch was treated with 140 ml of water and made into dough by mixing the powder and water together Then 3 0 g of Sodium metabisulphate was added and mixed thoroughly Then 2 ml of glycerol and 2 ml of red dye solution were added and mixed well Then the dough was packed in small tray like container tightly and used for taking impression of small objects The material is found to be getting displaced, unlike compressible biofoam, on pressing the object over it
Example 2
About 100 g of finely powdered coconut oil cake was treated with 66 ml of coconut oil, mixed thoroughly with hand and made into dough 3 0 g of potassium metabisulphate was added and mixed well Then 3 ml of dibutyl phthalate was added and thoroughly mixed Then the material was packed into a flat tray like container for taking impression of small objects and stored at 14 °C At room temperature, in open air, the material is found to set within 24 hrs and dry within 48hrs
Example 3
About 60 g of starch was treated with 40 ml of water, mixed thoroughly with hand and made into dough 1 5 g of sodium sulphate was added and mixed well Then 1 0 ml of dnsooctyl phthalate was added and thoroughly mixed Then the material was packed into a flat tray like container for taking impression of small objects and stored at 14°C The material is found to be stable with the retention of moisture, if stored in closed container at 20 °C or below
Example 4
About 3000 g of starch was treated with 2000 ml of water and mixed thoroughly with hand and made into dough 50 g of potassium bisulphate was added and
mixed through out the mass Then 50 ml of dibutyl phthalate and 40 ml of green dye solution were added and thoroughly mixed with hand to distnbute the color uniformly Then the material was tightly packed into a tray of 6mm height for taking impression of foot and stored at 14°C The material was found to retain the shape and dimensions of the impression of foot till it sets and there was no change in volume of the impression after the material had set
The main advantages of the present invention are
1 Convenient and easy method of making foot impression
2 Elevated detail reproduction
3 No deformation in the mold
4 Use of natural material for preparing impression material
5 Gives mold of the foot in weight bearing position
6 Reduction of user's error and no need for skilled person to use it
7 Reusability and
8 Cost effective
TECHNICAL DATA
1 COMPOSITION / INFORMATION ON INGREDIENTS
Hazardous components and corresponding classification None
2 HAZARDS IDENTIFICATION
No specific hazards are encountered under normal product use
3 HANDLING AND STORAGE
Incompatible material none in particular
Storage conditions keep the container at a temperature 14 degree C
4 PHYSICAL PROPERTIES
Appearance thick paste Odour slight pungent Solubility in water Insoluble
5 STABILITY AND REACTIVITY
Conditions to avoid microbial /fungal growth over the surface if stored at temperature above 20 degree C Substance to avoid none in particular Hazardous decomposition products none
6 TOXICOLOGICAL INFORMATION
The exactly product doesn't have cytotoxic effects on the L929 cellular line
7 ECOLOGICAL INFORMATION
Adopt sound working practices, so that the product is not released into the environment
8 DISPOSAL CONSIDERATIONS
Degradable, can be disposed out freely






We Claim:
1. A formulation for the preparation of a material for taking impression of an object characterized in that it comprises a base material selected from starch or powdered oil cake having particle size such as herein described , a binder selected from water or vegetable oil 66-86% v/w on the basis of base material, 1.5 -3.0% w/w of a preservative on the basis of base material, 1 - 3% v/w of plasticizer on the basis of base material, and optionally 1 - 4% v/v of a coloring agent such as herein described .
2. A formulation as claimed in claim 1, wherein oil cake used is selected from coconut oil cake, ground nut oil cake, gingili oil cake.
3. A formulation as claimed in claims 1-2, wherein vegetable oil used is selected from coconut oil, ground nut oil, gingili oil, castor oil.
4. A formulation, as claimed in claims 1 to 3 wherein plasticizer used is selected from dioctyl phthalate, dibutyl phthalate, diisooctyl phathalate, glycerol.
5. A formulation as claimed in claims 1 to 4, wherein preservative used is selected from sodium bisulphate, potassium bisulphate, sodium metabisulphate, potassium metabisulphate, sodium sulphate, sodium dioxide.
6. A formulation as claimed in claims 1 - 5 wherein the particle size of starch used is ranging from 100-750µ.
7. A formulation as claimed in claims 1 to 6 wherein the particle size of oil cake used is ranging from 2000-2500µ.
8. A formulation for the preparation of a material for taking impression of an object, substantially as herein described with reference to the examples.

Documents:

49-del-2002-abstract.pdf

49-del-2002-claims.pdf

49-del-2002-correspondence-others.pdf

49-del-2002-correspondence-po.pdf

49-del-2002-description (complete).pdf

49-del-2002-description (provisional).pdf

49-del-2002-form-1.pdf

49-del-2002-form-18.pdf

49-DEL-2002-Form-2.pdf

49-del-2002-form-3.pdf

49-del-2002-form-5.pdf


Patent Number 236827
Indian Patent Application Number 49/DEL/2002
PG Journal Number 49/2009
Publication Date 04-Dec-2009
Grant Date 24-Nov-2009
Date of Filing 25-Jan-2002
Name of Patentee COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH
Applicant Address RAFI MARG, NEW DELHI-110 001,INDIA
Inventors:
# Inventor's Name Inventor's Address
1 GNANASUNDARAM SARASWATHY CENTRAL LEATHER RESEARCH INSTITUTE,ADYAR, CHENNI-600 020,INDIA
2 THOTAPALLI PARVATHALESWARA SASTRY CENTRAL LEATHER RESEARCH INSTITUTE,ADYAR, CHENNI-600 020,INDIA
3 GAUTHAM GOPALAKRISHNA CENTRAL LEATHER RESEARCH INSTITUTE,ADYAR, CHENNI-600 020,INDIA
4 BHABENDRA NATH DAS CENTRAL LEATHER RESEARCH INSTITUTE,ADYAR, CHENNI-600 020,INDIA
PCT International Classification Number A61B 5/17
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA